15
controller (Check Figure 1-1). A twin-cord cable is recommended but not
required.
Please be careful to spot the
‗+‘ and ‗-‘ when connecting. No damage will result
if the polarity is reversed, but the controller can‘t read a reversed sensor
voltage. Plugging the voltage sensor wires into to the RTS300R10K5.08A
terminals (10
th
Port) will cause an alarm or damage the controller.
③
Communicate Connection
WARNING:
Shock Hazard!
There should not any communication cables and power lines
intertwined. Separate them as far as possible to void electric shock.
AVERTISSEMENT :
Risque d'électrochoc!
Il ne doit y avoir aucun mélange entre les câbles de communication
et les lignes d'alimentation. Séparez-les avec une distance aussi
grande que possible pour éviter un électrochoc.
There are two kinds of communication: RS-232 and RS-485. Please use
matching communication cables and make sure the cables are connected
firmly during data transmitting: the below features are supported with
communication interface:
Monitor each controller on the network using Solar Station PC software;
update the firmware.
RS-232, RS-485 Connection
The controller is a standard 3.81-4P port. Check Figure 1-1 for the port location.
The RS-232 port is 7
th
port and the RS-485 port is 8
th
port on the controller.
④
Power Wires Connection
PV Wire Size
Since PV array output can vary due to the PV module size, connection method
or sunlight angle, the minimum wire size can be calculated by the I
SC
of PV
array. Please refer to the value of I
SC
in PV module specification. When the PV
modules connect in series, the I
SC
is equal to the PV
module‘s I
SC
. When the
PV modules connect in parallel, the I
SC
is equal to the sum of PV
module‘s I
SC
.
The I
SC
of PV array must not exceed the maximum PV input current, please
refer to the table as below:
